Portable ramp



FIG. 1 is a top plan view of the portable ramp showing our new design, portions of the ramp are shown broken away to indicate indeterminate length;

FIG. 2 is a side elevational view thereof, the opposite side elevational view being a mirror image of that shown;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a perspective view thereof. 

The ornamental design for a portable ramp, as shown and described. 